【摘要】 特高压输电线路的建设对无线电设施造成了无源干扰,其主要是由输电线路的金属部件在无线电波激励下产生感应电流,进而产生反射波引起。该反射波会影响无线电测向台的测向精度,引起示向度误差。为此,建立了铁塔–架空地线系统的电磁散射模型,采用矩量法与电路相结合的方法求解输电线路在无线电波激励下产生的感应电流和反射波,该方法计算结果与解析法计算结果、现场试验测量数据吻合性较好。更多还原

【Abstract】 The construction of UHV power transmission lines lead to passive interference to radio facilities.The main reason of the passive interference is that under the energizing of radio waves induced currents are produced in metal parts of UHV transmission lines and then the reflected radio electromagnetic waves are produced,and the reflected radio electromagnetic waves affect the finding accuracy of short-wave direction-finding stations and cause the error in lateral precision of direction-finding stations.An electromagneitc scattering model composed of transmission tower and overhead line system is built and by combining the method of moment(MOM) and Norton’s theorem the induced currents and reflected radio electromagnetic waves produced in transmission lines due to the energization of radio waves are solved.Calculation results by the proposed method well conform to both calculation results by analytical method and measurd resuls from filed tests.更多还原